Swing-frame grinder.



T. F. PHILIPPI.

SWING FRAME GRINDER.

APPLICATION FILED AUG. 23, 1912.

1,052,844. Patented Feb. 11,1913.

55 Tz zz Q 3 UNITED -"W m 'rnnononn'r. PHILIPPE, or- EAST srrfLoms, ILLINOIS.

SWING-FRAME GRINDER.

To all whom it may concern) Be it known that I, THEODORE F. Pmmrrr, a citizen of the United States oi America, and a resident of East St. Louis, county of St. Clair, and State of Illinois, have invented certain new and useful Improvem'entsln Swing-Frame Grinders, of which the following is a full, clear, and exact de- \scr1pt1on, reference being had to the accompanying drawings, forming a part of this specification.

My invention ielates' to a swing frame grander and has for its object the production-of a grinder carried by a pendant and grinder embodying. the ,itea'tures of my in;

vention. Fig/II is a section on, the line IIII', F ig. I.- Fig. III is a view similar to F ig. II illustrating a'modific'ation. Fig.

IV is a vertical section taken approximately on the line IVIV,. Fig. I.

In the accompanying drawings: 1 desig nates a pendant having its upper 'end pivotally connected at 2 to the hanger 3. A horizontal arm 4 extending from the lower end of the pendant is pivoted to said pendant at 5 and provided atits free end with a grinding wheel 6. A shaft 7, secured to the grinding wheel is mounted in bearings 8 and provided with a pulley'9. The upper end of the pendant 1 is preferably in the form of a yoke 10 and a motor 11 is preferably supported in said yoke. Transmis-. sion pulleys 12 and '13 are located at the junction of the arm 4 and pendant 1. Power is transmitted from the power pulley 14 on the motor to the grinding wheel 6 through the medium of a belt 15 passing around the pulleys 12 andf14 and a second .belt 16 passing around the pulleys9 and 13.

The means for counterbalancing the free end of the arm 4 comprises a lever'16. pivotally supported by a swivel 17, a counterweight 18 at one end of said lever and a chain 19 connecting the opposite end of said lever to the free end of the arm 4. The lower end of the pendant 1 is a 121 1 swivitification of Letters Patent.

Application filed August 23, 1912. Scrial'No. 716,625.

eled to the vertical rod, as seen in Fig. IV, and the arm 4 carrying the grinding wheel is therefore free to swing about the axis of the pendant. To permit the counterbalance lever 16 to swing horizontally with the arm 4, the swivel 17 is rockably fitted to anarm 17 onone of the hangers 3. The movement of the lever 16 is limited by the side bars of a yoke 3 at the-lower end of a-hanger 3 (see Fig. II).

In the practical use of this apparatus, the operator engages handles 20 at thefree end Qf the arm 4 and swings the grinding wheel along the surface of the work. A very objectionable feature in the usual types of swing frame grinders is the. labor required to swing the arm and pendant. This enders it difiicult to operate the grinder and limits the stroke of the swinging frame to a slight distance. This invention includes a counterweight attached tothe pendant so "as to provide for a wide range of movement of the swinging frame with "cry little labor on the part of the operator. 21 designates counterbalance lever, pivoted at 22 to the? lower end of a hanger 3, and provided at its upper end with a counterweight 23.

Patented Feb. 11,1913.

pivotally mounted link 24 connects the lower endof the lever 21 to the pendant 1. It will be readily. understood that when the pendant 1 swings on its plvot in either direction the" counterweight 23 will 'swing in the opposite direction, and overcome the tendency of the pendant to return to vertical position.

Fig. III illustrates a. modification in which the grinder is driven from and pivotally supported by a shaft 11'.

A swing frame grinder comprising hangers, a pendant piv'otally supported by said hangers, the lower portion of said pendant being a swivel, an arm pivoted to said swivel and extending at an angle therefrom, said arm being movable both horizontally and vertically, a grinder carried by the free end of said arm, a counterbalance lever connected to said arm, and a swivel supporting said counterbalance lever so as to allow said, lever to swing horizontally in response to horizontal movements of said arm. THEODORE F. PHILIPPI.

Witnesses:

A. J. MGCAULEY, E. B. LINN. 

